skip empty factions in secondary effects

BGS/Report.cs

@@ -130,6 +130,13 @@ namespace EliteBGS.BGS {
                         string faction = other;
                         string influence = completed.GetInfluenceForFaction(faction);
 
+                        /* ignore empty factions which can happen 
+                         * I assume that this denotes that you are losing REP with a superpower
+                         */
+                        if (string.IsNullOrEmpty(faction)) {
+                            continue;
+                        }
+
                         results.Add(new InfluenceSupport() {
                             Faction = faction,
                             Influence = influence,